–– It is ridiculous that John wants to make academic progress but never devotes any time to it.

––– Maybe it’s time for him to know______.

A．heaven never helps the man who will not act

B．he who makes constant complaint gets little compassion.

C．hope for the best, but prepare for the worst

D．It is easy to be wise after the event.

男性，65岁，冠状病史10余年，冠脉造影检查后，出现恶心、纳差。BUN22mmol／L，Cr230mmol／L，Hb118g/L，尿量500ml，BP140/80mmHg，最可能的诊断是（）

A.慢性肾衰竭

B.急性肾衰竭

C.缺血性肾病

D.过敏性间质性肾炎

E.良性肾小动脉硬化